One vertex per element, one color per generator, with an edge from x to x·s.
(2,5)(6,8)(9,10)(11,14)(12,13)(15,16)(18,22)(24,30)(25,29)(27,31) involution — undirected(1,2,4,5)(3,6,7,8)(17,18,23,30,26,29,28,27,19,22,20,24,21,25,32,31)(1,3)(2,6)(4,7)(5,8)(10,13)(14,16)(17,18,19,22)(20,27,23,31)(21,29,26,25)(24,32,30,28)(3,7)(6,8)(9,11,12,15)(10,14,13,16)(18,22)(24,30)(25,29)(27,31)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.